<html>
<head>
    <meta charset="utf-8">
    <title>jquery简单倒计时</title>

    <script type="text/javascript" src="js/jquery.min.js"></script>
                                                            <script type="text/javascript">

    var intDiff = parseInt(60);//倒计时总秒数量

                                 function timer(intDiff) {
    window.setInterval(function() {
        var day = 0,
        hour = 0,
        minute = 0,
        second = 0;//时间默认值
                     if (intDiff > 0) {
        day = Math.floor(intDiff / (60 * 60 * 24));
        hour = Math.floor(intDiff / (60 * 60)) - (day * 24);
        minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);
        second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);
    }
    if (minute <= 9)
    minute = '0' + minute;
    if (second <= 9)
    second = '0' + second;
    $('#day_show').html(day + "天");
    $('#hour_show').html('<s id="h"></s>' + hour + '时');
    $('#minute_show').html('<s></s>' + minute + '分');
    $('#second_show').html('<s></s>' + second + '秒');
    intDiff--;
    }, 1000);
    }

    $(function() {
    timer(intDiff);
    });
    </script>
      </head>
        <body>
        <h1>网页上的倒计时</h1>
                     <div class="time-item">
    <span id="day_show">0天</span>
                            <strong id="hour_show">0时</strong>
                                                       <strong id="minute_show">0分</strong>
                                                                                    <strong id="second_show">0秒</strong>
                                                                                                                 </div>
    <!--倒计时模块-->
        </body>
          </html>